Merge "Add hidden API getDataSaverViaCmFlag() for CTS" into main am: eb33cf470d am: dbe057c6cf

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2822810

Change-Id: I636216e6d0389432261a0ed9cf7cc807118d34c7
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>